I finished my first, and probably last diaper pail liner. I picked up some PUL fabric when I was in another state for Christmas at Joann's with a 50% off coupon. For some reason the laminated side of this fabric was on the same side as the print, so it wouldn't work for diaper covers. It does make a cute pail liner though. This liner has an elastic edge, and I made it extra large to fit over the handles on my diaper pail.
I first measured my pail and drew out the dimensions. I made it 3 1/2 inches taller than my pail so there would be enough to fold over the edge and 1 1/2 inches wider to allow for a 1/2 inch seam allowance and some extra room to fit over the pail handles.